/**
 * Created by Administrator on 2019/6/4.
 */
var none=document.querySelector('#navbarNavAltMarkup');
var cc='aa';
function run() {
    if (cc=='aa'){
        none.style.display='block';
        cc='bb'
    }else if(cc=='bb'){
        none.style.display='none';
        cc='aa'
    }

}